public class Person {
    private String name;
    private int age;
    private String occupation;
    private String gender;
    private String address;

    public Person(String name, int age, String occupation) {
        this.name = name;
        this.age = age;
        this.occupation = occupation;
        this.gender = "Unknown";
        this.address = "Unknown";
    }

    public Person(String name, int age, String occupation, String gender, String address) {
        this.name = name;
        this.age = age;
        this.occupation = occupation;
        this.gender = gender;
        this.address = address;
    }

    public void introduce() {
        System.out.println("Hello, my name is " + name + ".");
        System.out.println("I am " + age + " years old.");
        System.out.println("My occupation is " + occupation + ".");
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getAddress() {
        return address;
    }
}
